Takagi T-K3 Service Manual

T-K3 Service Manual
Ver. 1.05
29
CONFI DENTIAL
10-17. GFI
T-K3 Part #
#703
Takagi Part #
EKN73
Checkpoint
A, A1
Function
Failure event
Effects on the T-K3
if the GFI fails.
Error codes when
the GFI fails.
D iagnostic
Color/Number of
wires
N/A
1. Visual inspection: connection/breakage of wires and/or some signs of
electrical damage on the GFI
2. Check the power supply to the GFI. If the red LED on the GFI lights up after
pressing the “test“ button, the GFI is receiving power. After verifying the power
supply, verify that 100VAC is entering and leaving the GFI.
-D etects electrical leakage in the T-K3.
-Stops providing power to the T-K3 in the case of electrical leakage.
1. ON-failu re: Always in th e ON mo de (never tr ips) .
2. OFF-failure: Always in the OFF mode (always stays tripped).
1. ON-failure: GFI cannot detect electrical leakage within the T-K3.
2. OFF-failure: the T-K3 does not receive any power from the GFI, which
m ea ns the T-K3 ca nn ot op er ate.
N/A
1-7/8" (50mm)
2-3/4" (69mm)
1- 1/ 8" (3 0m m)
2-1/4" (58mm)
Reset button
Test button
From
transformer
To the computer
board

Takagi T-K3 Specifications

General

Type	Tankless
Installation Type	Indoor
Maximum BTU Input	199, 000 BTU/h
Gas Connection Size	3/4"
Vent Size	3"
Hot Water Flow Rate (at 35°C rise)	6.6 GPM
Maximum Input	199, 000 BTU/h